ABB ACS320 - Feedback from the Drive - EFB; Pre-Defined Feedback; Mailbox ReadWrite

Fieldbus control 297
Feedback from the drive – EFB
 Pre-defined feedback
Inputs to the controller (drive outputs) have pre-defined meanings established by the
protocol. This feedback does not require drive configuration. The following table lists
a sample of feedback data. For a complete listing, see input word/point/object listings
in the technical data for the appropriate protocol starting on 302.
Note: With Modbus, any parameter can be accessed using the format: 4 followed by
the parameter number.
 Mailbox Read/Write
The ACS320 provides a “Mailbox” function to access parameters that have not been
pre-defined by the protocol. Using mailbox, any drive parameter can be identified and
read. Mailbox can also be used to adjust parameter settings by writing a value to any
parameter identified. The following table describes the use of this function.
1.As noted above, Modbus provides direct access to all parameters using the format: 4 followed by the
parameter number.
Drive Parameter
Protocol Reference
Modbus N2 FLN BACnet
0102 SPEED 40102 AI3 5 AV0
0103 FREQ OUTPUT 40103 AI1 2 AV1
0104 CURRENT 40104 AI4 6 AV4
0105 TORQUE 40105 AI5 7 AV5
0106 POWER 40106 AI6 8 AV6
0107 DC BUS VOLT 40107 AI11 13 AV2
0109 OUTPUT VOLTAGE 40109 AI12 14 AV3
0115 KWH COUNTER 40115 AI8 10 AV8
Name Description
Protocol Reference
Modbus
1
N2 FLN BACnet
Mailbox
Parameter
Enter the number of the drive
parameter to access.
Does not
apply.
AO19 95 AV25
Mailbox
Data
Contains the parameter value after a
read, or enter the desired parameter
value for a write.
AO20 96 AV26
Mailbox
Read
A binary value triggers a read – the
value of the “Mailbox Parameter”
appears in “Mailbox data”.
BO19 97 BV15
Mailbox
Write
A binary value triggers a write – the
drive value for the “Mailbox Parameter”
changes to the value in “Mailbox data”.
BO20 98 BV16